# ThinkDiag+ vs OBD2 Scanner

ThinkDiag+ and OBD2 Scanner both sit at 4.5 stars, but that hides the real split: 74% of ThinkDiag+'s written reviews are positive against 23% of OBD2 Scanner's. ThinkDiag+ also leads on in-app purchases (none vs 6) and ads (none vs shown). On price, rating, update cadence and monetization model there is nothing between them.

Both are free to download. OBD2 Scanner sells 6 in-app purchases, starting at $6.99 per 7 days. ThinkDiag+ asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.5 for ThinkDiag+ against 4.6 for OBD2 Scanner. Both are backed by a comparable volume of ratings — 4.4K and 1.1K respectively. Written reviews are what separate them: 74% of ThinkDiag+'s written reviews are positive against 23% of OBD2 Scanner's.

ThinkDiag+ ships an update every 3 weeks, OBD2 Scanner monthly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ThinkDiag+ | OBD2 Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4.4K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews) | **[4.6 (1.1K ratings)](https://appshunter.io/ios/app/obd2-scanner-torque-elm-327/id6477899127/reviews)** |
| Number of ratings | **4.4K** | 1.1K |
| Positive reviews | **74.1% of reviews** | 22.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 539 MB | 102 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [Phong Pham](https://appshunter.io/developer/1731047500) |

## What reviewers say

### ThinkDiag+

[App page](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979)

This app provides professional-level vehicle diagnostics, offering features like reading/clearing fault codes, data flow analysis, and special maintenance functions. It supports a wide range of car brands and allows users to subscribe to specific diagnostic software. Connects via Bluetooth to your smartphone for intelligent vehicle analysis.

**Highlights:** OE-level diagnostic functions, Full OBD II diagnosis, Special maintenance functions, Supports 100+ vehicle brands, Automatic VIN reading, Professional diagnostic reports, In-app user community

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 🚀 Powerful diagnostic capabilities
- 🚀 Affordable price
- 🚀 Helpful customer support
- 🚀 Versatile for DIY and professionals

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🐛 Compatibility issues with certain vehicles
- 🔒 Concerns about annual subscription fees
- 🔒 Limited functionality on iOS devices

**Reported bugs**

- Failure to recognize VIN or vehicle information
- Inability to clear certain error codes
- Inconsistent performance across different devices

**Requested features**

- Improved user interface and navigation
- More detailed troubleshooting guides
- Expanded vehicle coverage and special functions
- Offline mode for diagnostics


### OBD2 Scanner

[App page](https://appshunter.io/ios/app/obd2-scanner-torque-elm-327/id6477899127)

Transform your smartphone into a powerful car diagnostic tool. Monitor real-time engine data, read and clear trouble codes, and track your vehicle's performance. Customize your dashboard and access repair manuals to understand and fix issues.

**Highlights:** Real-time engine data monitoring, Read and clear trouble codes, Performance tracking, Customizable dashboards, Repair manual database, Compatibility with OBD2 ELM327 adapters

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium weeky freetrial | $6.99 | per 7 days |
| Premium Weekly | $7.99 | per 7 days |
| Premium Monthly | $14.99 | per month |
| Premium Monthly | $17.99 | per month |
| Premium Yearly | $59.99 | per year |
| Lifetime Premium | $69.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use setup
- ✅ Works well for some vehicle models
- ⭐ Useful for basic OBD2 scanning

**What reviewers complain about**

- 💰 Expensive pricing for limited functionality
- 🐛 Bluetooth connection drops frequently
- ❌ Poor compatibility with many vehicle models
- 📱 Deceptive UI with hidden exit menus
- 🔒 Security concerns and unauthorized charges

**Reported bugs**

- Bluetooth connection drops and requires reboot
- App fails to connect to OBD2 devices
- Sensors display N/A values in paid version
- Cannot select vehicle profile
- App crashes or becomes unresponsive

**Requested features**

- Oil temperature and transmission data
- Wheel sensor information
- Pending DTC display
- Permanent check engine light clearing
- Module-specific scanning selection


## Frequently asked questions

### Is ThinkDiag+ free?

ThinkDiag+ is free to download, with no in-app purchases.

### Is OBD2 Scanner free?

OBD2 Scanner is free to download, with in-app purchases available.

### Which has better reviews, ThinkDiag+ or OBD2 Scanner?

OBD2 Scanner is rated higher. ThinkDiag+ averages 4.5 out of 5 from 4.4K ratings, while OBD2 Scanner averages 4.6 from 1.1K ratings.

### Do ThinkDiag+ or OBD2 Scanner have ads?

OBD2 Scanner shows ads; ThinkDiag+ does not.

### Which is updated more often, ThinkDiag+ or OBD2 Scanner?

ThinkDiag+ ships an update every 3 weeks, and OBD2 Scanner monthly. Most recently, ThinkDiag+ was updated on October 26, 2026 and OBD2 Scanner on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*